I would like know what you think is a good ratio for LM /city size, starting from lvl. for both.
1:1, until level 14, and then full city, is the optimal way to gain the maximum amount of region points, if your team only plays on one city for the whole server (except for the end game).
anything else will make you lose some region points. Of course you might gain some other things in exchange. But there are too many possibilities there for me to list them all. Especially because I'm usually only interested in the maximum region points and nothing else.